I'm a complete noob to Ubuntu/Linux. Obviously Ubuntu is having trouble with my NVIDIA card and thus produces graphics glitches and craziness at the login screen. I tried pressing SHIFT on bootup in order to boot with nomodeset but didn't get any Grub menu.
I can however boot my live USB stick with nomodeset. Can I install the proper GPU drivers (or restore the Grub menu) onto my HDD-installed Ubuntu from the live USB somehow?
And if so, how?

If you have a solution, please explain it to me like I'm five - I'm really not proficient at this stuff at all!
Thanks in advance for any advice!

That was easier than expected. :) ALT + CTRL + F2 brought me into the console and there I used sudo apt-get install linux-sourcesudo apt-get install linux-headers-genericsudo apt-get install nvidia-current-updates to install the graphics drivers. Now everything seems to work. For the moment at least. ;) Thanks!
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cruxfilmJan 5 '13 at 14:09